"""
cron: */10 * * * *
new Env('汇率数据采集');
"""
import requests
import os
import mysql.connector
from datetime import datetime

# 获取环境变量
host = os.environ.get('HOST')
user = os.environ.get('USER')
password = os.environ.get('PASSWORD')
database = os.environ.get('DATABASE')

print("正在获取环境变量...")
print(f"数据库地址：{host}")
print(f"数据库用户名：{user}")
print(f"数据库密码：{password}")
print(f"数据库名称：{database}")

# 发送HTTP请求获取汇率数据
print("发送HTTP请求获取汇率数据...")
headers = {
    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36'
}

# 使用开放的汇率API
url = 'https://api.exchangerate-api.com/v4/latest/CNY'
response = requests.get(url, headers=headers)

# 连接数据库
connection = mysql.connector.connect(
    host=host,
    user=user,
    password=password,
    database=database
)

cursor = connection.cursor()

# 创建表（如果不存在）
create_table_query = """
CREATE TABLE IF NOT EXISTS ningm_exchange_rate (
    id INT AUTO_INCREMENT PRIMARY KEY,
    base_currency VARCHAR(10) NOT NULL,
    target_currency VARCHAR(10) NOT NULL,
    rate DECIMAL(20,6) NOT NULL,
    create_time DATETIME DEFAULT CURRENT_TIMESTAMP,
    INDEX idx_currency_pair (base_currency, target_currency),
    INDEX idx_create_time (create_time)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
"""
cursor.execute(create_table_query)

# 删除旧数据（保留7天内的数据）
print("删除旧数据...")
delete_query = "DELETE FROM ningm_exchange_rate WHERE create_time < DATE_SUB(NOW(), INTERVAL 7 DAY)"
cursor.execute(delete_query)

# 解析并保存数据
print("解析并保存汇率数据...")
if response.status_code == 200:
    data = response.json()
    rates = data.get('rates', {})
    base_currency = 'CNY'
    
    # 主要货币列表
    main_currencies = ['USD', 'EUR', 'JPY', 'GBP', 'AUD', 'CAD', 'HKD']
    
    for currency in main_currencies:
        rate = rates.get(currency)
        if rate:
            print(f"正在保存汇率数据: {base_currency}/{currency}")
            insert_query = """
                INSERT INTO ningm_exchange_rate 
                (base_currency, target_currency, rate) 
                VALUES (%s, %s, %s)
            """
            insert_values = (
                base_currency,
                currency,
                rate
            )
            cursor.execute(insert_query, insert_values)

connection.commit()
cursor.close()
connection.close()

print("数据保存完成！") 